Greddy type-s BOV flutter

[Jason97GS-T]

Ok I just want to start out by saying that I have been reading alot about this and have been getting mixed awnsers. Half of the people say to do the single spring mod and set it softer, and the other half say to plug the lower nipple into boost source. I just want to know which one is the right one to do? Also if I do need to use a boost source where should I plug it. Thanks for any help.

 

[rich3389]

neither in my opinion, if the diaphragm is good it should open just fine.

 

[Jason97GS-T]

So you are saying that my diaphragm is bad and needs to be replaced?

 

[niddydsm]

1) there is only two nipples on the bov
2) top should be plugged into a vac source
3) bottom nipple can be be hooed up to your wastgate
the easiest way to get rid of the flutter is to play with the bolt/screw on top of the bov. At any psi under 5-6 it is going to flutter no matter ###

 

[JusMX141]

neither in my opinion, if the diaphragm is good it should open just fine.

Not really the case.

The lower nipple is the Greddy's quick-release feature...the same device that is plumbed into the base of the factory 1G blow off valve. By performing the Dodge Garage Mod on the 1G valve, you're bypassing the valve's quick-release feature and enabling it to hold more boost, but it will be slow to respond at lower boost levels- causing flutter / compressor surge much like the OP is experiencing with his Greddy.

If you're at or near a stock boost level you may want to consider using the Greddy's quick-release feature in order to protect the turbo from compressor surge as the valve cannot open properly at low boost. There's just not enough pressure escaping the piping to overcome the spring tension of the valve no matter how loose it's set.

Hooking the quick-release up is simple- you need to tee into your boost source at the compressor housing (normally the source that is connected to your wastegate actuator or manual boost controller).

 

[90redtalontsi]

my buddy had an evo and his fluttered at every boost setting no matter what he did the set it softer or harder nothing worked so he got another thinking it was bad and the next one brand new did the same thing so he returned the new one and put the old one back on and he has had no problems with his car i guess those bovs just do that i have an hks ssqv and its amazing never flutters no matter what psi was well worth the 300 bucks i spent on it

 

[JusMX141]

i have an hks ssqv and its amazing never flutters no matter what psi was well worth the 300 bucks i spent on it

There is not a blow off valve made worth $300.

 

[90redtalontsi]

ok sorry i thought so since hks stands behind all there stuff and if it breaks they said they would send me a new one once i sent the old one back which elminates buying a few of the greddy ones and it never leaks becasue of the pull diaphram but my apologies

 

[Jason97GS-T]

If you're at or near a stock boost level you may want to consider using the Greddy's quick-release feature in order to protect the turbo from compressor surge as the valve cannot open properly at low boost. Hookup is simple- you need to tee into your boost source at the compressor housing (normally the source that is connected to your wastegate actuator or manual boost controller).

I am near stock boost level. GReddys quick release feature is that the lower nipple? I do have a MBC. Is this where I would tee it off?

 

[rich3389]

Tee it from the pressure source line, not the wastegate line like you have pictured.

 

[JusMX141]

Correct- tee between the pressure source and the MBC.

I believe the reason this problem isn't known more publicly is most people won't upgrade their blow off valves until they're at or exceeding a boost level where the stocker will leak. At that point, you're already exceeding the point that a Greddy will flutter if the quick-release isn't hooked up.

 

[Jason97GS-T]

Ok I will Tee that of then. Do I still need to set it softer?

I also have another Question, but different topic. I just recently installed my MBC. I didnt cap off the plug on the intake, but I did Tee off a hose in a circle. Is that ok or should I use a cap. Here is a crappy picture of what it looks like:

 

[trevnasty]

so do you run your vac line to the top nipple as well from the intake manfold and the quick release from the wastegate

 

[Dsmj89]

I'm using a normal vac cap on mine, never had a problem running it this way.
You can either put a vac cap on it and zip-tie it, or jb-weld the nipple shut.

 

[2slow4utsi]

I hope you fix the problem. Where did you get your Type S from they are so hard to find! Someone pm me with a lead! :]

 

[Jason97GS-T]

I hope you fix the problem. Where did you get your Type S from they are so hard to find! Someone pm me with a lead! :]

Thanks I have to wait till tuesday to fix it. Good thing I walk to work but I will update when I do.

I got mine off of the classifieds here, but I would also check ebay.

 

[2slow4utsi]

I think I will check the classifieds. My friend just got one for $40 off this IGNORANT kid. I was so pissed.

 

[Jason97GS-T]

It was probably the knock-off type s bov. When you do buy one make sure it is than authentic GReddy type s bov.

 

[2slow4utsi]

Oh no it was real. The kid I talked to that sold it said it was just sitting in his garage cause he got a different bov and had no idea it was worth that much. I was like =-o.

 

[Jason97GS-T]

Yeah I bought mine for $155 shipped

 

[Jason97GS-T]

I just teed the lower nipple of the BOV to the pressure line and it does not flutter with anything over 5psi. It also held boost up to 13psi when before it was around 10 to 11. It is also a lot louder when it releases.

At any psi under 5-6 it is going to flutter no matter what

Is this true? Also I am trying to understand what the "flutter" noise sounds like. Does it sound kinda like a deep moan? that is the best why that I can describe the noise when I let off the gas pedal under 5psi.

 

[Grimis]

how will this run with a EBC? I only ask as i have a "look-a-like" comming and will be running a 14b at low levels and i don't want the flutter (plus the fact i havent found my guide for my EBC yet nor know where the dang thing is ><)

 

[92AWDHX40]

Got mine off ebay 100 bucks shipped, ive seen them lately going for over 150 bucks, even around 200 when i looked this week. I cant believe people are spending so much on them. I lucked up and got a great deal on mine, its damn near mint, and powder coated my top, the flutter mine does too.

 

[Jason97GS-T]

Why do you got to jack the thread Grimis That is a

the flutter mine does too

Can you describe your flutter noise? Thanks

 

[JEFFREYCASTGSX]

I hope you fix the problem. Where did you get your Type S from they are so hard to find! Someone pm me with a lead! :]

Theres a new brand that is actually good at making a replica, but has been redesigned to be better. So it really isnt a knockoff, its called NGR, google it.